Well I don't really know how much torque a helicopter would need. The only number I was able to find was that a 35-foot rotor could spin about 550 RPM. Even with a smaller rotor that would spin somewhat faster, I was guessing that a reasonable gear ratio would give an electric motor plenty of torque at those speeds.

And we are back at square one where the whole point was to go multirotor to avoid the gearbox and cyclic pitch complexity.

In a car, it's a bit similar thing. With a combustion engine it optimizes to a single engine with fixed + variable ratio and shafts to the wheels and things like differentials. Lots of places to have oil, to maintain, to break, being heavy too. Tesla has 1-2 electric motors with a fixed gear ratio of about 10. Some concept vehicles have a direct drive motor near each wheel or even inside the wheel.

The electric motor has different characteristics than a turbine or a piston engine. Hence it can affect the whole machine design.